hantol
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# Dierdre's school has 72 sixth-graders and 54 seventh-graders. What is the ratio of sixth-graders to seventh-graders in simplest form?

So you have fractions here I see. You have $\frac{72}{54}$, meaning there are 72 6th graders to 54 7th graders. Now get the greatest common factor of these numbers to simpify the fraction. $\frac{72}{54}$ and divide both numbers by 18, which is the gcf of 72 and 54. You will get $\frac{4}{3}$ Which is also equal to 1:1.25